Setup[edit | edit source]
Shortcuts[edit | edit source]
- CTRL+W closes a tab
- CTRL+T opens a new tab
- CTRL+SHIFT+T reopens the last closed tab
- F6 or Ctrl+L : Gets you right up into the Address/URL bar.
- F5 : Reload the page.
- CTRL+F5: Clear cache and reload the page.
- / or Ctrl+F: Search/find
- Ctrl+K : Takes you to the Firefox search box.
- Ctrl+U : View the page’s source.
- F11 : View the page in full-screen mode.
- Ctrl+W : Closes the active tab.
- Ctrl+= : Resets font size.
- Ctrl++ : Increases font size.
- Ctrl+- : Decreases font size.
Profiles[edit | edit source]
User profiles allow separating configuration, extensions, bookmarks, and history within Firefox. By default, there is one profile. The profile manager allows creating additional profiles. It can be opened by launching the Firefox process through a command line with the
-profilemanager parameter, without spaces.
Profile folders are typically located under
%AppData%\Mozilla\Firefox\ on Microsoft Windows, and
~/.mozilla/firefox/ on Linux and BSD. The profile manager allows manually specifying custom profile directories.
Relevant files in the profile folder are
places.sqlite for browsing history and download history and bookmarks,
prefs.js for user preferences, and
containers.json for configuration of multi-account containers. Sessions are stored in
sessionstore.jsonlz4 when closing the browser (before Firefox 56 of 2017, it was stored as plain JSON into
sessionstore.json), and backed up to
sessionstore-backups/recovery.baklz4 while browsing for recovery in case of an unexpected process termination. The previous session is backed up to
Advanced configuration[edit | edit source]
On the desktop edition (and earlier mobile versions), the
about:config page allows fine-tuning the browser. The search bar at the top facilitates finding properties.
Notable properties are:
browser.urlbar.trimURLs– may hide the protocol from the URL bar. Deactivate to always show the full URL including the protocol. Activated by default.
browser.backspace_action– this parameter adjusts the function of the backspace key if no text input field is active.
0: navigate to last page,
1: scroll up, if Shift key is held then scroll down.
browser.download.autohideButton– hide download button if no downloads in current session. Activated by default.
browser.open.lastDir– last directory to which a file was downloaded or from which a file was opened through the file picker dialogue.
browser.startup.homepage– page displayed when starting a new session (if not restoring the previous session), and when pressing the button with the house icon.
dom.ipc.processCount.web– number of processes across which web content is distributed. Higher count increases performance but consumes more memory, thus recommended for computers with much RAM. Four by default.
general.autoScroll– enable scrolling using middle mouse button press.
devtools.chrome.enabled– enable write access to browser console, accessed using Ctrl+Shift+J.
browser.cache.offline.capacitydisk cache capacity, mainly used for static resources to save bandwidth. Difference between values unclear yet. – Values in Kilobytes.
places.history.expiration.transient_current_max_pages: number of entries retained in the browsing history database (
System pages[edit | edit source]
about:memory– internal process viewer.
about:processes– newer internal process manager. Introduced with Firefox 67.
See also[edit | edit source]
- Iceweasel browser
- Firefox Development Wiki
- Mozilla Knowledge-Base Wiki
- links (browser), lynx (browser), Elinks (browser) command line browsers
[edit | edit source]
- Mozilla Firefox - Interactive learning quiz at Qedoc.org